#import <Foundation/Foundation.h>int main(int argc, const char * argv[]){ @autoreleasepool {// NSInteger int1 = 123;// NSNumber *number1 = [NSNumber numberWithInteger:int1];// NSLog(@"number1:%@",number1);// // NSInteger int2 = [number1 integerValue];// NSLog(@"int2:%ld",int2);// // float pi = 3.1415;// NSNumber *number2 = [NSNumber numberWithFloat:pi];// // float qq = [number2 floatValue];// NSLog(@"QQ:%lf",qq);//#if 0 //创建字典 NSDictionary *dictionary1 = [NSDictionary dictionaryWithObject:@"value" forKey:@"key"]; NSDictionary *dictionary2 = [NSDictionary dictionaryWithObjectsAndKeys:@"v1",@"k1",@"v2",@"k2",@"v3",@"k3",@"v4",@"k4",@"v5",@"k5", nil];//创建一对【键对值】 NSDictionary *dictionary3 = [NSDictionary dictionaryWithDictionary:dictionary1]; NSLog(@"dictionary1:%@",dictionary1);//key = value; NSLog(@"dictionary2:%@",dictionary2); /* k1 = v1; k2 = v2; k3 = v3; */ NSLog(@"dictionary3:%@",dictionary3);//key = value; //将数组转换为字典 NSArray *array1 = [NSArray arrayWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G", nil]; NSArray *array2 = [NSArray arrayWithObjects:@"a",@"b",@"c",@"d",@"e",@"f",@"g", nil]; NSDictionary *dictionary4 = [NSDictionary dictionaryWithObjects:array1 forKeys:array2]; NSLog(@"dictionary4:%@",dictionary4); /* a = A; b = B; c = C; d = D; e = E; f = F; g = G; */ //获取字典中的元素个数 NSUInteger count = [dictionary4 count]; NSLog(@"dictionary4:%ld",count);//dictionary4:7 //根据key值找出索引的内容 NSString *string1 = [dictionary4 objectForKey:@"e"]; NSLog(@"the key of dictionary4:%@",string1);//the key of dictionary4:E NSArray *array3 = [dictionary2 allKeys];//获取字典中所有的key值 /* k4, k3, k2, k5, k1 */ NSArray *array4 = [dictionary2 allValues];//获取字典种所有value NSLog(@"array3:%@\narray4:%@",array3,array4); /*v4, v3, v2, v5, v1 */ NSLog(@"************************************************************"); //转换成枚举，一般用于循环遍历 NSEnumerator *enum1 = [dictionary2 keyEnumerator]; for (NSString *string2 in enum1) { NSLog(@"%@",string2); } //创建一个空的可变字典// NSMutableDictionary *mutableDic1 = [[NSMusicDirectory alloc]init];// NSMutableDictionary *mutableDic2 = [NSMutableDictionary dictionary]; NSMutableDictionary *mutableDic1 = [NSMutableDictionary dictionaryWithObject:@"A" forKey:@"a"]; NSLog(@"添加一个键值对mutableDic1:%@",mutableDic1);//添加一个键值对 [mutableDic1 setValue:@"b" forKey:@"b"]; NSLog(@"%@",mutableDic1); NSMutableDictionary *mutableDic2 = [NSMutableDictionary dictionaryWithDictionary:dictionary1]; [mutableDic2 setDictionary:dictionary1];//可以通过setDictionary方法对一个空的可变字典赋值 NSLog(@"对一个空的可变字典赋值%@",mutableDic2); [mutableDic1 addEntriesFromDictionary:dictionary1]; NSLog(@"添加一个字典到可变%@",mutableDic1); [mutableDic1 removeObjectForKey:@"b"]; NSLog(@"删除后的可变字典%@",mutableDic1); #endif NSSet *set1 = [NSSet setWithObjects:@"a",@"b",@"c",@"d", nil]; NSLog(@"set1:%@",set1); NSSet *set2 = [[NSSet alloc]initWithObjects:@"x",@"y",@"z", nil ]; NSLog(@"set2:%@",set2); NSSet *set3 = [NSSet setWithSet:set1]; NSLog(@"set3:%@",set3); NSArray *array =[NSArray arrayWithObjects:@"x",@"y",@"z",@"o",nil]; NSSet *set4 = [NSSet setWithArray:array]; NSLog(@"%@",set4); NSLog(@"获取set4中所有元素:%@",[set4 allObjects]); NSLog(@"获取set4中某一个元素:%@",[set4 anyObject]); NSSet *set5 = [set1 setByAddingObject:@"p"]; NSSet *set6 = [set1 setByAddingObjectsFromArray:array]; NSSet* set7 = [set1 setByAddingObjectsFromSet:set2]; NSLog(@"将set1里面的所有元素放到set5里面但是没有改变set1里面的元素，set5在初始化的时候就添加了一个元素“p”%@",set5); NSLog(@"将数组里面的所有元素放在集合种，但是会把重复的元素去掉%@",set6); NSLog(@"根据已有的集合创建集合复制集合产生新的集合%@",set7); BOOL isCon = [set1 containsObject:@"a"]; NSLog(@"判断某元素是不是在集合中存在：%d",isCon); if (isCon == 1) { NSLog(@"found"); } else { NSLog(@"not found"); } NSSet *set8 = [NSSet setWithObjects:@"a",@"b",@"c",@"1", nil]; NSSet *set9 = [NSSet setWithObjects:@"a",@"d",@"e", nil]; NSSet *set10 = [NSSet setWithObjects:@"x",@"y",@"z", nil]; NSSet *set11 = [NSSet setWithObjects:@"x",@"y", nil]; BOOL isEqual = [set8 isEqualToSet:set9];//判断两个集合是否匹配 if (isEqual == 1) { NSLog(@"equal"); } else{ NSLog(@"not equal"); } BOOL isInset = [set8 intersectsSet:set10];//判断两个集合是否存在交集 if (isInset == 1) { NSLog(@"yes"); } else { NSLog(@"no"); } BOOL isSub = [set11 isSubsetOfSet:set10];//判断两个集合是否是另一个的字迹 if (isSub == 1) { NSLog(@"set11 是 set10 的子集"); } else { NSLog(@"set11 不是 set10 的子集"); } NSLog(@"************************************************************"); NSMutableSet *mutableSet1 = [NSMutableSet setWithObjects:@"1",@"2",@"3",@"4", nil];// NSLog(@"%@",mutableSet1); NSMutableSet *mutableSet2 = [NSMutableSet setWithObjects:@"3",@"4",@"5", nil]; // [mutableSet2 minusSet:mutableSet1];//两个集合相减，即当前者和后者有交集的时候，减去前者的交集，后者不变// NSLog(@"两个集合相减%@",mutableSet2); [mutableSet1 unionSet:mutableSet2];//两个集合相加，即当前者和后者有交集的时候，前者加上后者多出的元素，后者不变 NSLog(@"两个集合相加:%@",mutableSet1); [mutableSet1 intersectSet:set8];//获取不可变的集合与可变集合的交集 NSLog(@"获得两个集合的交集%@",mutableSet1); } return 0;}
